Multiplexing I/O in Haskell
Hello community, Is there a good/proper way to do multiplexing I/O in Haskell, similar to what we are getting by using select()/poll() in Unix kernel? It does not seem impossible to implement this on top of existing IO library (though I haven't tried this actually, so I may be wrong). What interest me most here is whether we could use Haskell's implicit multithreading here (select()/poll() combination is all about multithreading)? Thanks in advance, Sergey
On Thu, Sep 3, 2009 at 2:41 PM, Sergey V. Mikhanov
Hello community,
Is there a good/proper way to do multiplexing I/O in Haskell, similar to what we are getting by using select()/poll() in Unix kernel? It does not seem impossible to implement this on top of existing IO library (though I haven't tried this actually, so I may be wrong). What interest me most here is whether we could use Haskell's implicit multithreading here (select()/poll() combination is all about multithreading)?
There used to be a select()-like call available in a Posix-related module in older versions of GHC. It seems to have disappeared a while ago though. The current "best-practice" seems to be using forkIO "threads". The old-ish paper on the haskell web server[1] contains some numbers that suggest this is indeed a fairly high-performing solution. /M [1]: http://www.haskell.org/haskellwiki/Haskell_Web_Server -- Magnus Therning (OpenPGP: 0xAB4DFBA4) magnus＠therning．org Jabber: magnus＠therning．org http://therning.org/magnus identi.ca|twitter: magthe
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Sergey V. Mikhanov